A woman was getting her dog out of the car when the car began drifting down the driveway along Mahaffey Hill Road, authorities said. The car rolled down the driveway and the door of the vehicle struck someone before crashing into a tree, authorities said.
The victim, whose name hasn't been released, was taken to a Pittsburgh-area hospital. Her condition has not been released.
Stay with Channel 11 News and WPXI.com for updates.